If you haven't already got your (SP01) or Shadow, get it from Angus and have the work done all at one time. Saves big time on shipping. If Angus says the Peanut can be cut to fit, it will be done. TS barrel is .70" longer. He might even swap the stock 4.7" Shadow for the TS barrel + little bit of cash. Barrels $149.95 plus labor to cut and fit the TS Barrel.
If you haven't settled on a Supressor company, AWC Supressors will cut, thread, thread protector and test fire for funtion. And handle all your class 3 paperwork if you get their supressor at the same time. Or no supressor and just the thread protector. There's alot of nice looking guns out there being sold as Supressor ready